Earlier quoted context omitted.
I have extremely strong anecdotal evidence that sucralose is toxic to my gut fauna. Two years of suffering are enough to convince me, but I'm hopeful to see the research that confirms it sooner than later.
This is actually a good point: The fact that it does not get metabolized by the body does not mean it does not get metabolized by some valuable bacterial symbionts.
https://www.science.org/content/blog-post/trouble-erythritol